document.write( "Question 65590This question is from textbook An Incremental Development
\n" ); document.write( ": Solve by completing the square :\r
\n" ); document.write( "\n" ); document.write( "7 = 3x - 2x^2\r
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Algebra.Com's Answer #46315 by funmath(2933)\"\" \"About 
You can put this solution on YOUR website!
Solve by completing the square :\r
\n" ); document.write( "\n" ); document.write( "7 = 3x - 2x^2\r
\n" ); document.write( "\n" ); document.write( "Let's change the order, so it looks more like the other problems you've probably been doing:
\n" ); document.write( "-2x^2+3x=7
\n" ); document.write( "Divide everything by the coefficient of x^2, -2
\n" ); document.write( "\"-2x%5E2%2F-2%2B3x%2F-2=7%2F-2\"
\n" ); document.write( "\"x%5E2-%283%2F2%29x=-7%2F2\"
\n" ); document.write( "Multiply the coefficient of x, -(3/2) by 1/2, square it and add it to both sides of the equation. \"%28%281%2F2%29%2A%28-3%2F2%29%29%5E2=%28-3%2F4%29%5E2\"=9/16
\n" ); document.write( "\"x%5E2-%283%2F2%29x%2B9%2F16=-7%2F2%2B9%2F16\"
\n" ); document.write( "\"%28x-3%2F4%29%5E2=-7%2A8%2F%282%2A8%29%2B9%2F16\"
\n" ); document.write( "\"%28x-3%2F4%29%5E2=-56%2F16%2B9%2F16\"
\n" ); document.write( "\"%28x-3%2F4%29%5E2=-47%2F16\"
\n" ); document.write( "\"sqrt%28%28x-3%2F4%29%5E2%29=%2B-sqrt%28-47%2F16%29\"<--if you haven't had complex numbers yet, you can stop here and say \"no real solution,\" if you have, keep going:
\n" ); document.write( "\"x-3%2F4=%2B-sqrt%2847%29i%2F4\"
\n" ); document.write( "\"x-3%2F4%2B3%2F4=3%2F4%2B-sqrt%2847%29i%2F4\"
\n" ); document.write( "\"x=%283%2B-sqrt%2847%29i%29%2F4\"
\n" ); document.write( "Happy Calculating!!!
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